preserve type when loaded image is rescaled, #11543

[wxWidgets.git] / src / msw / choice.cpp

diff --git a/src/msw/choice.cpp b/src/msw/choice.cpp
index 3dcb4aa42abc2af7a3997da271200bd98c1e7fa7..5abb57a2c55e5739a35e4b0c3c150414a17585e7 100644 (file)
--- a/src/msw/choice.cpp
+++ b/src/msw/choice.cpp
@@ -26,8 +26,9 @@
 
 #if wxUSE_CHOICE && !(defined(__SMARTPHONE__) && defined(__WXWINCE__))
 
 
 #if wxUSE_CHOICE && !(defined(__SMARTPHONE__) && defined(__WXWINCE__))
 

+#include "wx/choice.h"
+

 #ifndef WX_PRECOMP
 #ifndef WX_PRECOMP

-    #include "wx/choice.h"

     #include "wx/utils.h"
     #include "wx/log.h"
     #include "wx/brush.h"
     #include "wx/utils.h"
     #include "wx/log.h"
     #include "wx/brush.h"


@@ -69,7 +70,7 @@ wxBEGIN_FLAGS( wxChoiceStyle )
 
 wxEND_FLAGS( wxChoiceStyle )
 
 
 wxEND_FLAGS( wxChoiceStyle )
 

-IMPLEMENT_DYNAMIC_CLASS_XTI(wxChoice, wxControl,"wx/choice.h")
+IMPLEMENT_DYNAMIC_CLASS_XTI(wxChoice, wxControlWithItems,"wx/choice.h")

 
 wxBEGIN_PROPERTIES_TABLE(wxChoice)
     wxEVENT_PROPERTY( Select , wxEVT_COMMAND_CHOICE_SELECTED , wxCommandEvent )
 
 wxBEGIN_PROPERTIES_TABLE(wxChoice)
     wxEVENT_PROPERTY( Select , wxEVT_COMMAND_CHOICE_SELECTED , wxCommandEvent )


@@ -85,7 +86,7 @@ wxEND_HANDLERS_TABLE()
 
 wxCONSTRUCTOR_4( wxChoice , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size )
 #else
 
 wxCONSTRUCTOR_4( wxChoice , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size )
 #else

-IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControl)
+IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControlWithItems)

 #endif
 /*
     TODO PROPERTIES
 #endif
 /*
     TODO PROPERTIES


@@ -116,8 +117,8 @@ bool wxChoice::Create(wxWindow *parent,
     wxASSERT_MSG( !(style & wxCB_DROPDOWN) &&
                   !(style & wxCB_READONLY) &&
                   !(style & wxCB_SIMPLE),
     wxASSERT_MSG( !(style & wxCB_DROPDOWN) &&
                   !(style & wxCB_READONLY) &&
                   !(style & wxCB_SIMPLE),

-                  _T("this style flag is ignored by wxChoice, you ")
-                  _T("probably want to use a wxComboBox") );
+                  wxT("this style flag is ignored by wxChoice, you ")
+                  wxT("probably want to use a wxComboBox") );

 
     return CreateAndInit(parent, id, pos, size, n, choices, style,
                          validator, name);
 
     return CreateAndInit(parent, id, pos, size, n, choices, style,
                          validator, name);


@@ -152,11 +153,26 @@ bool wxChoice::CreateAndInit(wxWindow *parent,
     }
 
     // and now we may finally size the control properly (if needed)
     }
 
     // and now we may finally size the control properly (if needed)

-    SetBestSize(size);
+    SetInitialSize(size);

 
     return true;
 }
 
 
     return true;
 }
 

+void wxChoice::SetLabel(const wxString& label)
+{
+    if ( FindString(label) == wxNOT_FOUND )
+    {
+        // unless we explicitly do this here, CB_GETCURSEL will continue to
+        // return the index of the previously selected item which will result
+        // in wrongly replacing the value being set now with the previously
+        // value if the user simply opens and closes (without selecting
+        // anything) the combobox popup
+        SetSelection(-1);
+    }
+
+    wxChoiceBase::SetLabel(label);
+}
+

 bool wxChoice::Create(wxWindow *parent,
                       wxWindowID id,
                       const wxPoint& pos,
 bool wxChoice::Create(wxWindow *parent,
                       wxWindowID id,
                       const wxPoint& pos,


@@ -210,93 +226,74 @@ WXDWORD wxChoice::MSWGetStyle(long style, WXDWORD *exstyle) const
 
 wxChoice::~wxChoice()
 {
 
 wxChoice::~wxChoice()
 {

-    Free();
+    Clear();

 }
 
 // ----------------------------------------------------------------------------
 // adding/deleting items to/from the list
 // ----------------------------------------------------------------------------
 
 }
 
 // ----------------------------------------------------------------------------
 // adding/deleting items to/from the list
 // ----------------------------------------------------------------------------
 

-int wxChoice::DoAppend(const wxString& item)
+int wxChoice::DoInsertItems(const wxArrayStringsAdapter& items,
+                            unsigned int pos,
+                            void **clientData, wxClientDataType type)

 {
 {

-    int n = (int)SendMessage(GetHwnd(), CB_ADDSTRING, 0, (LPARAM)item.c_str());
-    if ( n == CB_ERR )
-    {
-        wxLogLastError(wxT("SendMessage(CB_ADDSTRING)"));
-    }
-    else // ok
-    {
-        // we need to refresh our size in order to have enough space for the
-        // newly added items
-        if ( !IsFrozen() )
-            UpdateVisibleHeight();
-    }
+    MSWAllocStorage(items, CB_INITSTORAGE);

 
 

-    InvalidateBestSize();
-    return n;
-}
+    const bool append = pos == GetCount();

 
 

-int wxChoice::DoInsert(const wxString& item, unsigned int pos)
-{
-    wxCHECK_MSG(!(GetWindowStyle() & wxCB_SORT), -1, wxT("can't insert into sorted list"));
-    wxCHECK_MSG(IsValidInsert(pos), -1, wxT("invalid index"));
+    // use CB_ADDSTRING when appending at the end to make sure the control is
+    // resorted if it has wxCB_SORT style
+    const unsigned msg = append ? CB_ADDSTRING : CB_INSERTSTRING;

 
 

-    int n = (int)SendMessage(GetHwnd(), CB_INSERTSTRING, pos, (LPARAM)item.c_str());
-    if ( n == CB_ERR )
-    {
-        wxLogLastError(wxT("SendMessage(CB_INSERTSTRING)"));
-    }
-    else // ok
+    if ( append )
+        pos = 0;
+
+    int n = wxNOT_FOUND;
+    const unsigned numItems = items.GetCount();
+    for ( unsigned i = 0; i < numItems; ++i )

     {
     {

-        if ( !IsFrozen() )
-            UpdateVisibleHeight();
+        n = MSWInsertOrAppendItem(pos, items[i], msg);
+        if ( n == wxNOT_FOUND )
+            return n;
+
+        if ( !append )
+            pos++;
+
+        AssignNewItemClientData(n, clientData, i, type);

     }
 
     }
 

+    // we need to refresh our size in order to have enough space for the
+    // newly added items
+    if ( !IsFrozen() )
+        MSWUpdateDropDownHeight();
+

     InvalidateBestSize();
     InvalidateBestSize();

+

     return n;
 }
 
     return n;
 }
 

-void wxChoice::Delete(unsigned int n)
+void wxChoice::DoDeleteOneItem(unsigned int n)

 {
     wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::Delete") );
 
 {
     wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::Delete") );
 

-    if ( HasClientObjectData() )
-    {
-        delete GetClientObject(n);
-    }
-

     SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
 
     if ( !IsFrozen() )
     SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
 
     if ( !IsFrozen() )

-        UpdateVisibleHeight();
+        MSWUpdateDropDownHeight();

 
     InvalidateBestSize();
 }
 
 
     InvalidateBestSize();
 }
 

-void wxChoice::Clear()
+void wxChoice::DoClear()

 {
 {

-    Free();
-

     SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0);
 
     if ( !IsFrozen() )
     SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0);
 
     if ( !IsFrozen() )

-        UpdateVisibleHeight();
+        MSWUpdateDropDownHeight();

 
     InvalidateBestSize();
 }
 
 
     InvalidateBestSize();
 }
 

-void wxChoice::Free()
-{
-    if ( HasClientObjectData() )
-    {
-        unsigned int count = GetCount();
-        for ( unsigned int n = 0; n < count; n++ )
-        {
-            delete GetClientObject(n);
-        }
-    }
-}
-

 // ----------------------------------------------------------------------------
 // selection
 // ----------------------------------------------------------------------------
 // ----------------------------------------------------------------------------
 // selection
 // ----------------------------------------------------------------------------


@@ -367,7 +364,7 @@ int wxChoice::FindString(const wxString& s, bool bCase) const
    else
    {
        int pos = (int)SendMessage(GetHwnd(), CB_FINDSTRINGEXACT,
    else
    {
        int pos = (int)SendMessage(GetHwnd(), CB_FINDSTRINGEXACT,

-                                  (WPARAM)-1, (LPARAM)s.c_str());
+                                  (WPARAM)-1, (LPARAM)s.wx_str());

 
        return pos == LB_ERR ? wxNOT_FOUND : pos;
    }
 
        return pos == LB_ERR ? wxNOT_FOUND : pos;
    }


@@ -381,25 +378,22 @@ void wxChoice::SetString(unsigned int n, const wxString& s)
     // we have to delete and add back the string as there is no way to change a
     // string in place
 
     // we have to delete and add back the string as there is no way to change a
     // string in place
 

-    // we need to preserve the client data
-    void *data;
-    if ( m_clientDataItemsType != wxClientData_None )
-    {
-        data = DoGetItemClientData(n);
-    }
-    else // no client data
-    {
-        data = NULL;
-    }
+    // we need to preserve the client data manually
+    void *oldData = NULL;
+    wxClientData *oldObjData = NULL;
+    if ( HasClientUntypedData() )
+        oldData = GetClientData(n);
+    else if ( HasClientObjectData() )
+        oldObjData = GetClientObject(n);

 
     ::SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
 
     ::SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);

-    ::SendMessage(GetHwnd(), CB_INSERTSTRING, n, (LPARAM)s.c_str() );
+    ::SendMessage(GetHwnd(), CB_INSERTSTRING, n, (LPARAM)s.wx_str() );

 
 

-    if ( data )
-    {
-        DoSetItemClientData(n, data);
-    }
-    //else: it's already NULL by default
+    // restore the client data
+    if ( oldData )
+        SetClientData(n, oldData);
+    else if ( oldObjData )
+        SetClientObject(n, oldObjData);

 
     InvalidateBestSize();
 }
 
     InvalidateBestSize();
 }


@@ -453,24 +447,46 @@ void* wxChoice::DoGetItemClientData(unsigned int n) const
     return (void *)rc;
 }
 
     return (void *)rc;
 }
 

-void wxChoice::DoSetItemClientObject(unsigned int n, wxClientData* clientData)
+// ----------------------------------------------------------------------------
+// wxMSW-specific geometry management
+// ----------------------------------------------------------------------------
+
+namespace

 {
 {

-    DoSetItemClientData(n, clientData);
-}

 
 

-wxClientData* wxChoice::DoGetItemClientObject(unsigned int n) const
+// there is a difference between the height passed to CB_SETITEMHEIGHT and the
+// real height of the combobox; it is probably not constant for all Windows
+// versions/settings but right now I don't know how to find what it is so it is
+// temporarily hardcoded to its value under XP systems with normal fonts sizes
+const int COMBO_HEIGHT_ADJ = 6;
+
+} // anonymous namespace
+
+void wxChoice::MSWUpdateVisibleHeight()

 {
 {

-    return (wxClientData *)DoGetItemClientData(n);
+    if ( m_heightOwn != wxDefaultCoord )
+    {
+        ::SendMessage(GetHwnd(), CB_SETITEMHEIGHT,
+                      (WPARAM)-1, m_heightOwn - COMBO_HEIGHT_ADJ);
+    }

 }
 
 }
 

-// ----------------------------------------------------------------------------
-// wxMSW specific helpers
-// ----------------------------------------------------------------------------
+#if wxUSE_DEFERRED_SIZING
+void wxChoice::MSWEndDeferWindowPos()
+{
+    // we can only set the height of the choice itself now as it is reset to
+    // default every time the control is resized
+    MSWUpdateVisibleHeight();
+
+    wxChoiceBase::MSWEndDeferWindowPos();
+}
+#endif // wxUSE_DEFERRED_SIZING

 
 

-void wxChoice::UpdateVisibleHeight()
+void wxChoice::MSWUpdateDropDownHeight()

 {
     // be careful to not change the width here
 {
     // be careful to not change the width here

-    DoSetSize(wxDefaultCoord, wxDefaultCoord, wxDefaultCoord, GetSize().y, wxSIZE_USE_EXISTING);
+    DoSetSize(wxDefaultCoord, wxDefaultCoord, wxDefaultCoord, GetSize().y,
+              wxSIZE_USE_EXISTING);

 }
 
 void wxChoice::DoMoveWindow(int x, int y, int width, int height)
 }
 
 void wxChoice::DoMoveWindow(int x, int y, int width, int height)


@@ -493,126 +509,97 @@ void wxChoice::DoMoveWindow(int x, int y, int width, int height)
 
 void wxChoice::DoGetSize(int *w, int *h) const
 {
 
 void wxChoice::DoGetSize(int *w, int *h) const
 {

+    wxControl::DoGetSize(w, h);
+

     // this is weird: sometimes, the height returned by Windows is clearly the
     // total height of the control including the drop down list -- but only
     // this is weird: sometimes, the height returned by Windows is clearly the
     // total height of the control including the drop down list -- but only

-    // sometimes, and normally it isn't... I have no idea about what to do with
-    // this
-    wxControl::DoGetSize(w, h);
+    // sometimes, and sometimes it isn't so work around this here by using our
+    // own stored value if we have it
+    if ( h && m_heightOwn != wxDefaultCoord )
+        *h = m_heightOwn;

 }
 
 void wxChoice::DoSetSize(int x, int y,
                          int width, int height,
                          int sizeFlags)
 {
 }
 
 void wxChoice::DoSetSize(int x, int y,
                          int width, int height,
                          int sizeFlags)
 {

-    // the height which we must pass to Windows should be the total height of
-    // the control including the drop down list while the height given to us
-    // is, of course, just the height of the permanently visible part of it
-    if ( height != wxDefaultCoord )
+    // we need the real height below so get the current one if it's not given
+    if ( height != wxDefaultCoord && height != GetBestSize().y )

     {
     {

-        // don't make the drop down list too tall, arbitrarily limit it to 40
-        // items max and also don't leave it empty
-        size_t nItems = GetCount();
-        if ( !nItems )
-            nItems = 9;
-        else if ( nItems > 24 )
-            nItems = 24;
-
-        // add space for the drop down list
-        const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
-        height += hItem*(nItems + 1);
+        // set our new own height but be careful not to make it too big: the
+        // native control apparently stores it as a single byte and so setting
+        // own height to 256 pixels results in default height being used (255
+        // is still ok)
+        m_heightOwn = height;
+
+        if ( m_heightOwn > UCHAR_MAX )
+            m_heightOwn = UCHAR_MAX;
+        // nor too small: see MSWUpdateVisibleHeight()
+        else if ( m_heightOwn < COMBO_HEIGHT_ADJ )
+            m_heightOwn = COMBO_HEIGHT_ADJ;

     }
     }

-    else
+    else // height not specified

     {
     {

-        // We cannot pass wxDefaultCoord as height to wxControl. wxControl uses
-        // wxGetWindowRect() to determine the current height of the combobox,
-        // and then again sets the combobox's height to that value. Unfortunately,
-        // wxGetWindowRect doesn't include the dropdown list's height (at least
-        // on Win2K), so this would result in a combobox with dropdown height of
-        // 1 pixel. We have to determine the default height ourselves and call
-        // wxControl with that value instead.
-        int w, h;
-        RECT r;
-        DoGetSize(&w, &h);
-        if (::SendMessage(GetHwnd(), CB_GETDROPPEDCONTROLRECT, 0, (LPARAM) &r) != 0)
-        {
-            height = h + r.bottom - r.top;
-        }
+        DoGetSize(NULL, &height);

     }
 
     }
 

-    wxControl::DoSetSize(x, y, width, height, sizeFlags);
-
-    // This solution works on XP, but causes choice/combobox lists to be
-    // too short on W2K and earlier.
-#if 0
-    int widthCurrent, heightCurrent;
-    DoGetSize(&widthCurrent, &heightCurrent);

 
     // the height which we must pass to Windows should be the total height of
     // the control including the drop down list while the height given to us
 
     // the height which we must pass to Windows should be the total height of
     // the control including the drop down list while the height given to us

-    // is, of course, just the height of the permanently visible part of it
-    if ( height != wxDefaultCoord && height != heightCurrent )
+    // is, of course, just the height of the permanently visible part of it so
+    // add the drop down height to it
+
+    // don't make the drop down list too tall, arbitrarily limit it to 30
+    // items max and also don't make it too small if it's currently empty
+    size_t nItems = GetCount();
+    if (!HasFlag(wxCB_SIMPLE))

     {
     {

-        // don't make the drop down list too tall, arbitrarily limit it to 40
-        // items max and also don't leave it empty
-        unsigned int nItems = GetCount();

         if ( !nItems )
             nItems = 9;
         if ( !nItems )
             nItems = 9;

-        else if ( nItems > 24 )
-            nItems = 24;
+        else if ( nItems > 30 )
+            nItems = 30;
+    }
+
+    const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
+    int heightWithItems = 0;
+    if (!HasFlag(wxCB_SIMPLE))
+        heightWithItems = height + hItem*nItems;
+    else
+        heightWithItems = SetHeightSimpleComboBox(nItems);

 
 

-        // add space for the drop down list
-        const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
-        height += hItem*(nItems + 1);
+
+    // do resize the native control
+    wxControl::DoSetSize(x, y, width, heightWithItems, sizeFlags);
+
+
+    // make the control itself of the requested height: notice that this
+    // must be done after changing its size or it has no effect (apparently
+    // the height is reset to default during the control layout) and that it's
+    // useless to to do it when using the deferred sizing -- in this case it
+    // will be done from MSWEndDeferWindowPos()
+#if wxUSE_DEFERRED_SIZING
+    if ( m_pendingSize == wxDefaultSize )
+    {
+        // not using deferred sizing, update it immediately
+        MSWUpdateVisibleHeight();

     }
     }

-    else // keep the same height as now
+    else // in the middle of deferred sizing

     {
     {

-        // normally wxWindow::DoSetSize() checks if we set the same size as the
-        // window already has and does nothing in this case, but for us the
-        // check fails as the size we pass to it includes the dropdown while
-        // the size returned by our GetSize() does not, so test if the size
-        // didn't really change ourselves here
-        if ( width == wxDefaultCoord || width == widthCurrent )
-        {
-            // size doesn't change, what about position?
-            int xCurrent, yCurrent;
-            DoGetPosition(&xCurrent, &yCurrent);
-            const bool defMeansUnchanged = !(sizeFlags & wxSIZE_ALLOW_MINUS_ONE);
-            if ( ((x == wxDefaultCoord && defMeansUnchanged) || x == xCurrent)
-                    &&
-                 ((y == wxDefaultCoord && defMeansUnchanged) || y == yCurrent) )
-            {
-                // nothing changes, nothing to do
-                return;
-            }
-        }
-
-        // We cannot pass wxDefaultCoord as height to wxControl. wxControl uses
-        // wxGetWindowRect() to determine the current height of the combobox,
-        // and then again sets the combobox's height to that value. Unfortunately,
-        // wxGetWindowRect doesn't include the dropdown list's height (at least
-        // on Win2K), so this would result in a combobox with dropdown height of
-        // 1 pixel. We have to determine the default height ourselves and call
-        // wxControl with that value instead.
-        //
-        // Also notice that sometimes CB_GETDROPPEDCONTROLRECT seems to return
-        // wildly incorrect values (~32000) which looks like a bug in it, just
-        // ignore them in this case
-        RECT r;
-        if ( ::SendMessage(GetHwnd(), CB_GETDROPPEDCONTROLRECT, 0, (LPARAM) &r)
-                    && r.bottom < 30000 )
-        {
-            height = heightCurrent + r.bottom - r.top;
-        }
+        // we need to report the size of the visible part of the control back
+        // in GetSize() and not height stored by DoSetSize() in m_pendingSize
+        m_pendingSize = wxSize(width, height);

     }
     }

-
-    wxControl::DoSetSize(x, y, width, height, sizeFlags);
-#endif
+#else // !wxUSE_DEFERRED_SIZING
+    // always update the visible height immediately
+    MSWUpdateVisibleHeight();
+#endif // wxUSE_DEFERRED_SIZING

 }
 
 wxSize wxChoice::DoGetBestSize() const
 {
     // find the widest string
     int wChoice = 0;
 }
 
 wxSize wxChoice::DoGetBestSize() const
 {
     // find the widest string
     int wChoice = 0;

+    int hChoice;

     const unsigned int nItems = GetCount();
     for ( unsigned int i = 0; i < nItems; i++ )
     {
     const unsigned int nItems = GetCount();
     for ( unsigned int i = 0; i < nItems; i++ )
     {


@@ -629,12 +616,30 @@ wxSize wxChoice::DoGetBestSize() const
 
     // the combobox should be slightly larger than the widest string
     wChoice += 5*GetCharWidth();
 
     // the combobox should be slightly larger than the widest string
     wChoice += 5*GetCharWidth();

+    if( HasFlag( wxCB_SIMPLE ) )
+    {
+        hChoice = SetHeightSimpleComboBox( nItems );
+    }
+    else
+        hChoice = EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight());

 
 

-    wxSize best(wChoice, EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight()));
+    wxSize best(wChoice, hChoice);

     CacheBestSize(best);
     return best;
 }
 
     CacheBestSize(best);
     return best;
 }
 

+int wxChoice::SetHeightSimpleComboBox(int nItems) const
+{
+    int cx, cy;
+    wxGetCharSize( GetHWND(), &cx, &cy, GetFont() );
+    int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, (WPARAM)-1, 0);
+    return EDIT_HEIGHT_FROM_CHAR_HEIGHT( cy ) * wxMin( wxMax( nItems, 3 ), 6 ) + hItem - 1;
+}
+
+// ----------------------------------------------------------------------------
+// MSW message handlers
+// ----------------------------------------------------------------------------
+

 WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 {
     switch ( nMsg )
 WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 {
     switch ( nMsg )